Unpublished paper, 'A method of deducing the longitude from the moon's right ascension' by Thos [Thomas] Kerigan Kerigan explains his method for finding the true meridian of the place of observation from the moon's right ascension. He provides examples of these calculations and states that when a chronometer with the mean time at Greenwich is also used, the longitude of any place can be determined. Includes one figure in the text. Subject: Geodesy / Astronomy Written by Kerigan in Portsea [Porstmouth, England]. Communicated by Sir Edwd [Edward] Codrington. Received by the Royal Society from the President [Augustus Frederick] on 18 February 1832. Read 15 March 1832. Whilst the Royal Society declined to publish this paper in full, an abstract of the paper was published in volume 3 of Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London [later Proceedings of the Royal Society] as 'A method of deducing the longitude from the moon’s right ascension'. 28 January 1832